Content originally posted in LPCWare by lpcxpresso-support on Mon Aug 11 00:23:14 MST 2014
_ROR() is provided by the CMSIS "core_cmInstr.h" file. This should get pulled in if you link against either the CMSIS-CORE library project for the part you are using, or else with the LPCOpen libraries. Please see the LPCXpresso User Guide for more details.
Regards,
LPCXpresso Support